Rubidium vs Cadmium
| Property | Rb Rubidium | Cd Cadmium |
|---|---|---|
| Atomic number | 37 | 48 |
| Symbol | Rb | Cd |
| Name | Rubidium | Cadmium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 85.4678 u | 112.414 u |
| Period | 5 | 5 |
| Group | 1 | 12 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s1 | [Kr]5s24d10 |
| Oxidation states | [-1, 1] | [-2, 1, 2] |
| Electronegativity (Pauling) | 0.82 | 1.69 |
| Electron affinity | 0.4859 eV | -0.7 eV |
| Density | 1530 kg/m³ | 8690 kg/m³ |
| Melting point | 39.31 °C | 321.07 °C |
| Boiling point | 687.85 °C | 766.85 °C |
| Discovery year | 1861 | 1817 |